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Test Code
IX
Test Name
Factor IX Activity
CPT Codes
85250
Expected Turnaround Time
2 - 4 days
Clinical Utility

Factor IX deficiency can be inherited or acquired. Inherited deficiency of factor IX is found in hemophilia B. Acquired deficiency of factor IX is detected in the presence of factor IX inhibitors, liver disease and in coumadin therapy.
Specimen and Container Info

Specimen Type: Plasma  

Collection Container: 1 Full Light Blue Top (Sodium Citrate) 
Collection Instructions

Blood should be collected in a blue-top tube containing 3.2% buffered sodium citrate. Evacuated collection tubes must be filled to completion to ensure a proper blood-to-anticoagulant ratio.

Processing and Submission Instructions

Create platelet poor plasma according to the Specimen Collection and Processing Guidelines for Coagulation Testing.

Patient Preparation
Testing is contradictory for patients on anticoagulant therapy.
Transport Instructions

Transport to the laboratory frozen. 
Stability Requirements

Frozen

Platelet poor plasma: 14 days
Causes for Rejection
  • Platelet poor plasma thawed in transit
  • Specimens past stability
Methodology
Mechanical Clot Detection
Reference Intervals
SexAgeReference IntervalUnit
FemaleAll Age Groups50-150%
MaleAll Age Groups50-150%
Performing Location
Roble Road Core Laboratory
Alternate Names
  • Factor 9
  • Antihemophilic Factor B
  • Christmas Factor
Testing Schedule
Routine, 3 times per week
The American Medical Association (AMA) Current Procedural Terminology (CPT) codes published by HNL Lab Medicine are guidelines and are intended for informational purposes only. CPT coding is the exclusive responsibility of the billing entity. View the Terms.
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